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PacketStar
®
PSAX 4500 Multiservice Media Gateway User Guide
, Issue 2
Release 8.0.0
Chapter 3 System Features
Multiservice Media Gateway Software Features
carrying traffic) or standby (normally idle). The feature permits N:1 and 1:1
schemes by allowing several primary interfaces and one standby interface to
exist with a user-defined interface protection group.
When a failure condition is detected on a primary interface, the feature
moves all affected connections from the primary interface to a standby inter-
face. The standby interface is selected from those available in the interface
protection group based on criteria selected by the user.
To use this feature, the following sequence of configuration tasks must be
performed:
1. Configuring the ports,channels, and interfaces on the modules (physical
layer interface)
2. Configuring connections (ATM layer and IWF)
3. Configuring the inteface protection groups
Figure 3-6 illustrates how a typical interface protection group configuration
works. After the protection groups are created, they are displayed on the Pro-
tection Group Table and the Interface Protection Table windows on the con-
sole interface. When a switchover is initiated by the primary interface, the
IWF for that interface is torn down and replaced by the standby interface’s
IWF within that group. These configurations are displayed on the appropriate
PVC connection screen.
This feature moves connections within a defined group whenever a failure
condition occurs or operator issues a switchover/switchback command.
•
The switchover method is automatic, where traffic from a primary interface
is automatically switched to an available standby interface, and Manual,
where traffic from a failed primary interface is only switched to the avail-
able standby interface when the User selects the switchover.
Figure 3-6. Typical Interface Protection Group Configuration
AX4000
Gen/Ana
DS3
IMA
IMA
DS1
PSAX 2300
Primary 4 Group 1
Primary 5 Group 1
Primary 2 Group 1
Primary 3 Group 1
Primary 6 Group 1
Primary 1 Group 1
ATM
